diff --git a/app/Controllers/MasterController.php b/app/Controllers/MasterController.php
index 2735db0..e68ccee 100644
--- a/app/Controllers/MasterController.php
+++ b/app/Controllers/MasterController.php
@@ -735,7 +735,7 @@ class MasterController extends BaseController
                 $documentUrl = base_url();
                 // helper('url');
                 
-                $url ='<a href="' . generate_signed_url('preview', ['doc_id'=> md5($doc_id)], 36000) . '">Preview and Approve Document</a>';
+                $url ='<a href="' . generate_signed_url('preview', ['doc_id'=> md5((string)$doc_id)], 36000) . '">Preview and Approve Document</a>';
                 // $businessData = $this->BranchModel->select('branches.* , business.business_name ')
                 //                                     ->join('business', 'branches.business_id = business.business_id', 'left')
                 //                                     ->where('branches.branch_id',$this->session->get('logged_in_staff_branch_id'))
@@ -748,7 +748,7 @@ class MasterController extends BaseController
                 // print_r($businessData);die;
                 $message = "Dear " . $clientData->client_name . ",<br>" . $businessData->business_name . " has requested your approval for a document. Please click the link below to preview and approve.<br><br>" . $url;
 
-                $mail_send = $MailHelper->send_url_email($clientData->email , $businessData->email, $subject, $message);
+                $MailHelper->send_url_email($clientData->email , '', $subject, $message);
                 $notificationHelper = new NotificationHelper();
                 $number = '91'.$clientData->mobile_no; // Replace with dynamic recipient number
                 if($clientData->whatsapp == 1){